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Consumer reports does not understand that RDA is not the Upper Limit for vitamin D – Sept 2012

Consumer Reports Investigates Vitamins and Supplements: Ten Dangers That May Surprise You

Clip You can overdose on vitamins and minerals.

Unless your health-care provider tells you that you need more than 100 percent of the recommended daily intake of a particular nutrient, you probably don’t.

Megadoses of the fat-soluble vitamins A, D, E, and K can cause problems, and even some standard doses may interfere with certain prescription medicines.

Surprisingly, some people may experience adverse effects from even normal doses of a vitamin or mineral supplement, especially patients with digestive issues or those who take blood thinners, says Dr. Mosquera.

Vitamin D In the US

RDA = 600 IU
Upper Limit = 4,000 IU, which is 6X larger than the RDA

A summary of many recommendations

see wikipage http://www.vitamindwiki.com/tiki-index.php?page_id=3057

Factoids

There has not been a death due to vitamin D in over 5 years
Over 500 people a year die in the US due to aspirin
Medical studies have only documented problems with 20,000 IU of vitamin D (33X larger than the RDA)

See also VitaminDWiki

Graph of dose vs week

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